JP2006138459A - Structure of check valve including press bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a check valve which can discharge air only by pressing slightly or which can reliably seal an air supply and exhaust opening attached to an air sack such as an air cushion or the like. <P>SOLUTION: The structure of the check valve is provided with a valve element 1 and a press bar. The valve element 1 includes a valve formed at its center, a cut-out portion 3 formed around the outer periphery of the valve portion, and a plane part formed extending from the outer periphery of the cut-out portion to the outer edge portion. Portions of the valve and the plane part are integrally connected to each other by a connecting section. The press bar is formed with a housing 6 having: a cylindrical part which is arranged on one side of the valve element 1 in an overlapping manner and in which the valve element 1 is fitted; a central opening formed in the upper face of the cylindrical part and having a diameter smaller than the outer diameter of the valve; a connecting cylinder connected to the central opening and projecting opposite to the valve; a press rod projecting from the ceiling of the connecting cylinder opposing to the central opening toward the central opening; and the air supply and exhaust opening formed in the side wall of the connecting cylinder. Further, the top outer diameter of the valve element 1 is set larger than its lower outer diameter, and the inner diameter of the cylindrical part in which the valve element is fitted is set smaller than the lower outer diameter of the valve element. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

Detailed Description of the Invention

  The present invention relates to a structure of an air supply / exhaust port used for air cushions, cushions, mattresses, floats, pools, etc. made of soft plastic such as soft vinyl chloride or polyurethane rubber used by enclosing air.

  As a conventional technique, for example, one described in Japanese Utility Model Application Publication No. 37-72 is known, and the structure is shown in FIG. That is, as shown in the outline drawing and the cross-sectional view, a mounting portion is formed at the bottom of the valve seat, and an air supply / exhaust port and a plug body connected to this to close the supply / exhaust port are formed at the upper part. A raised throat is formed in the lower part of the head. Further, as shown in the sectional view and the AA arrow view, a valve body is formed by providing a semicircular incision in the lower part of the raised throat.

  As a result, the attachment part is attached to an air bag such as a toy or a float, and when air is blown from the air supply / exhaust port, the valve body opens to inflate the air bag. The valve body acts as a check valve to prevent air leakage, and the plug body is inserted into the air supply / exhaust port to prevent double leakage. When the air in the air bag is discharged, if the outside of the valve body corresponding to both end positions of the semicircular incision part is pressed, the valve body of the incision part is deformed and a gap is formed in the seal part, and the air is discharged. It becomes possible.

Problems to be solved by the invention

  However, in such a conventional check valve structure, the raised throat has a thick structure in order to obtain mechanical strength and to provide a large sealing surface, and therefore, the outside of the valve body must be pressed with a large force. The air cannot be discharged, and the position of the pressing is limited to the positions corresponding to both ends of the semicircular incision outside the valve body, and the position cannot be clearly known from the outside. There are problems such as that the air cannot be discharged well even when pressed, and that the sealing surface of the valve body is a small area such as the semicircular incision portion of the valve body, so that reliable sealing cannot be performed.

  The present invention has been made by paying attention to the conventional problems as described above. The air supply / exhaust air has a clear pressing point, can be discharged only by lightly pressing, and can be reliably sealed by enlarging the sealing surface. The purpose is to provide a mouth.

Means for solving the problem

  In order to achieve the above-described object, the structure of the air supply / exhaust port is constituted by a housing and a valve body, the valve body is a hollow conical structure having a truncated cone shape, the top is a plane having a valve, and the side is a conical cylinder. The lower part of the conical cylinder opens. A valve is formed in the center of the top, a notch is formed on the outer periphery of the valve, a flat portion is formed from the outer periphery to the outer edge of the notch, and the valve and a part of the flat surface are integrally connected by a connecting portion. The lower outer diameter of the body is slightly larger than the top outer diameter.

  The housing includes a cylindrical portion into which the valve body is fitted, a central opening provided at the center of the cylindrical portion, a connecting cylinder continuous to the central opening, a push rod protruding from the connecting cylindrical ceiling toward the central opening, and a side wall of the connecting cylinder. Have air supply and exhaust ports. In addition, the inner diameter of the cylindrical portion into which the valve body is fitted is slightly smaller than the lower outer diameter of the valve body, and the central port is smaller than the outer diameter of the valve.

The invention's effect

  When the valve body is fitted into the housing cylindrical portion, the lower outer diameter of the valve body is slightly larger than the inner diameter of the cylinder. The valve body is held by the housing while ensuring tight sealing by pressing closely against the upper surface of the cylinder forming the central opening. Further, the sealing performance is improved by making the outer diameter of the valve larger than the central port. When the air in the air bag is discharged, the upper part of the connecting cylinder of the housing is pressed from the outside, so that the push rod pushes the valve, the valve is opened, and the air is discharged.

Embodiments and Examples of the Invention

  Embodiments of the present invention will be described below with reference to FIGS. The valve body 1 and the housing 6 are made of a soft synthetic resin such as soft vinyl chloride or polyurethane rubber. FIG. 1 is a check valve assembly drawing, FIG. 2 is a valve body, and FIG. 2 has a valve 2 formed at the top, a notch 3 is formed on the outer periphery of the valve 2, a flat portion 4 is formed on the outer periphery of the notch 3, and the valve 2 and a part of the flat portion 4 are connected. It is a hollow frustoconical structure that is integrally connected at the part 5 and has an open lower part that is formed with a lower outer diameter slightly larger than the outer diameter of the top part.

  The housing of FIG. 3 has an air bag attachment part 8, a cylindrical part 7 for accommodating the valve body 1, a central port 10 in the cylindrical upper surface 9, a connecting cylinder 11 connected to the central port 10 and protruding upward. A push rod 12 protruding from the ceiling of the connection cylinder 11 facing the center port 10 toward the center port 10 side, and a supply / exhaust port 13 and a plug body 14 for closing the plug 13 are provided on the side wall of the connection cylinder 11.

  FIG. 4 shows another method of attaching the push rod 12 to the valve 2. In this case, in order to support the weight of the push rod 12, there are three or more connecting portions 5 between the valve 2 and the flat portion 4 on the outer periphery of the notch portion 3. In the figure, there are four places.

In the check valve assembly drawing according to the present invention, the push rod is attached to the housing. It is component drawing which shows the valve body concerning this invention. It is component drawing which shows the housing concerning this invention. In the check valve assembly drawing according to the present invention, the push rod is attached to the valve. It is a structural diagram of Utility Model Application Publication No. 37-72 which is background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve body 2 Valve 3 Notch part 4 Flat part 5 Connection part 6 Housing 7 Cylindrical part 8 Mounting part 9 Upper surface 10 Central port 11 Connection cylinder 12 Push rod 13 Supply / exhaust port 14 Plug body

Claims (3)

A valve is formed in the center, a notch is formed on the outer periphery of the valve, a flat part is formed from the outer periphery to the outer edge of the notch, and the valve and a part of the flat part are integrated at the connecting part. A connected valve body and a cylindrical portion that is provided on one side of the valve body and that fits the valve body, and an upper surface of the cylindrical portion is a central port having a smaller diameter than the outer diameter of the valve A connecting cylinder that is connected to the central port and protrudes to the opposite side of the valve; a push rod that protrudes from the connecting cylindrical ceiling facing the central port toward the central port; and supply and exhaust air to the side wall of the connecting cylinder A check valve structure including a push rod constituted by a housing having a mouth. 2. The valve body structure according to claim 1, wherein the valve is formed at the top, and a hollow conical structure having a frustoconical shape with an opening at the bottom, and a lower outer diameter is larger than an outer diameter at the top. 2. The housing structure according to claim 1, wherein an inner diameter of a cylindrical portion of the housing into which the valve body is fitted is smaller than a lower outer diameter of the valve body.

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